Unit 2-Physical & Chemical Changes Test Corrections

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, involving a rearrangement of atoms.

Front

Example of a physical change?

Back

Melting ice, boiling water, and cutting a piece of paper are examples of physical changes.

Front

Example of a chemical change?

Back

Rusting iron, burning wood, and cooking an egg are examples of chemical changes.

Front

What happens during a physical change?

Back

During a physical change, the form of a substance may change, but its chemical identity remains the same.

Front

What happens during a chemical change?

Back

During a chemical change, the original substances are transformed into different substances with new chemical properties.

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

Is burning wood a physical or chemical change?

Back

Burning wood is a chemical change.

Front

What is an indicator of a chemical change?

Back

Indicators of a chemical change include color change, gas production, temperature change, and the formation of a precipitate.

Front

What is an example of a reversible physical change?

Back

Freezing and melting water is an example of a reversible physical change.